Gearman is a system to farm out work to other machines, dispatching function
calls to machines that are better suited to do work, to do work in parallel,
to load balance lots of function calls, or to call functions between languages.

/usr/share/doc/gearman-job-server/README.Debian

logging
-------
The gearman job server is configured to log to a file in
/var/log/gearman-job-server/. However the default verbosity of the server is so
low, that the file may not be created until really bad things happen.
The verbosity can be changed like other parameters in the default file located at
/etc/default/gearman-job-server
See also man gearmand